Originally Posted by
boybi
Can the airline industry or regulatory agency make a rule on allowable minimum seat width and pitch? I think they should regulate this.
Why would they do this?

They get their marching orders from the airlines via industry lobbyists, and I don't think airlines are out there advocating for bigger, roomier seats.
As for airlines of yesteryear that flew really cramped seats, I seem to recall America West as particularly uncomfortable...in the 29-30" range. (Not that I ever boarded with a tape measure...)
Also flew an occasional vacation charter that would be an ancient (even then) 727 with 29-30" seats, but I guess those are a separate category...